mathOnline, * is used to indicate multiplication to avoid confusion with x as an unknown. Online "^" is used to indicate an exponent, e.g., x^2 = x squared. (24 * 72)^2 = ? Multiply 24 by 72, then multiply that answer by itself.
March 30, 2015

PsychologyPlease only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
March 30, 2015

science helpSince this is not my area of expertise, I searched Google under the key words "rubidium electrons" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=rubidium+electrons&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 30, 2015

statisticsZ = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Is it ≤ .05?
March 29, 2015

statisticsWhen you get the missing data: Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
March 28, 2015

statisticsWe do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
March 27, 2015

statisticsZ = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
March 27, 2015

mathPlease do not use all caps. Not only is it harder to read, but it is like SHOUTING online. Thank you. I assume you want to know ages of Alyssa and Jeff. If Sarah is 8, then Jeff is 2 * 8 = ? Alyssa is 4 * ? = ??
March 25, 2015

mathF = S - 401 F + S = 3391 Substitute S-401 for F in the second equation and solve for S. Insert that value into the first equation to solve for F. Check by putting both values into the second equation.
March 25, 2015

scienceSince this is not my area of expertise, I searched Google under the key words "electrical deduction" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=electrical+deduction&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 24, 2015

mathsIf the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Since 3 sides are even and 3 are odd, the chances of even = 3/6 = 1/2. For three dice, probability of all even = (1/2)^3 = 1/2...
March 24, 2015

MathIf it is a rectangular prism, why would you sketch a triangle? First, find the perimeter, 2L + 2W. Then multiply by 200/4, "the top quarter of each vertical face."
March 23, 2015

statistisRange = highest score - lowest. Find the mean = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance...
March 23, 2015

Probability and StatistcisI don't know what five numbers you are seeking, but this might be a partial response. Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of ...
March 22, 2015

StatisticsIf the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .05^10 = ?
March 22, 2015

math"Before the third card is chosen" means a 1 is chosen as either the first card or second card. Probability of 1 being chosen as first card = 2/6. Assuming that the first card was not a 1, the probability of 1 being chosen as a second card = 2/5. Either-or ...
March 22, 2015

English"Go" is not necessary. "Sic" indicates that it was as written, even if erroneous. youre ready to go (sic) do something else (Jordan, first name, year, possibly page if book) https://www.google.com/search?client=safari&rls=en&q=text+...
March 21, 2015

mathA = S + 8 17A + 9S = 4,400 Substitute S+8 for A in the second equation and solve for S. Insert that value into the first equation to solve for A. Check by putting both values into the second equation.
March 21, 2015

statistics (jay)If you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
March 20, 2015

statistics (etoile)Ho: M = E Ha: M < E Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled ...
March 20, 2015

MathIf the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/14 * 1/13 * 1/12 = ?
March 20, 2015

Math needs helpIndicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Online "^" is used to indicate an exponent, e.g., x^2 = x squared.
March 17, 2015